
<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>
    <el-button type="text" @click="openChapterDialog()">添加章节</el-button>
    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title"/>
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 章节 -->
    <ul class="chanpterList">
      <li
        v-for="chapter in allChapterVideo"
        :key="chapter.id">
        <p>
          {{ chapter.title }}
          <span class="acts">
                <el-button type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
            </span>
        </p>
         <!--添加和修改小节表单-->
        <el-dialog :visible.sync="dialogVideoFormVisible" title="添加小节">
          <el-form :model="video" label-width="120px">
            <el-form-item label="小节标题">
              <el-input v-model="video.title"/>
            </el-form-item>
            <el-form-item label="小节排序">
              <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
            </el-form-item>
            <el-form-item label="是否免费">
              <el-radio-group v-model="video.isFree">
                <el-radio :label="true">免费</el-radio>
                <el-radio :label="false">默认</el-radio>
              </el-radio-group>
            </el-form-item>
            <el-form-item label="上传视频">
              <!-- TODO -->
            </el-form-item>
          </el-form>
          <div slot="footer" class="dialog-footer">
            <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
            <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
          </div>
        </el-dialog>

        <!-- 小节信息展示 -->
        <ul class="chanpterList videoList">
          <li
            v-for="video in chapter.children"
            :key="video.id">
            <p>{{ video.title }}
              <span class="acts">
                        <el-button type="text" @click="openEditVideo(video.id)">编辑</el-button>
                        <el-button type="text" @click="delVideo(video.id)">删除</el-button>
              </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>
    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>
  </div>
</template>

<script>
  import chapter from '@/api/edu/chapter'
  import video from '@/api/edu/video'
  export default {
    name: 'chapter',
    data(){
      return{
        saveBtnDisabled:false,
        allChapterVideo:[],
        courseId:'',
        chapter:{
          id:'',
          title:'',
          sort:0,
          courseId:''
        },
        video:{
          id:'',
          title: '',
          sort: 0,
          isFree:'',
          videoSourceId: '',
          chapterId:'',
          courseId:''
        },
        dialogChapterFormVisible:false,
        dialogVideoFormVisible:false,
      }
    },
    created(){
      //获取路由的id
      if (this.$route.params && this.$route.params.id){
        this.courseId=this.$route.params.id;
        this.getChapterVideo();
      }if (r.code==20000){
        this.dialogChapterFormVisible=false;
        this.$message({
          type:'success',
          message:'添加成功'
        })
        this.getChapterVideo();
      }else {
        this.$message({
          type:'error',
          message:'添加失败'
        })
      }
    },
    methods:{
      openVideo(chapterId){
        this.video.id=''
        this.video.title=''
        this.video.sort=0
        this.video.isFree=''
        this.video.videoSourceId=''
        this.dialogVideoFormVisible=true
        this.video.chapterId=chapterId;
        this.video.courseId=this.courseId;

      },

      openEditVideo(id){
        this.dialogVideoFormVisible=true
        video.getVideoInfo(id).then(r=>{
          this.video=r.data.video

        })

      },
      addVideo(){
        video.addVideo(this.video).then(r=>{
          if (r.code==20000){
            this.dialogVideoFormVisible=false;
            this.$message({
              type:'success',
              message:'添加成功'
            })
            this.getChapterVideo();
          }else {
            this.$message({
              type:'error',
              message:'添加失败'
            })
          }
        })
      },
      updateVideo(){
        video.updateVideo(this.video).then(r=>{
          if (r.code==20000){
            this.dialogVideoFormVisible=false;
            this.$message({
              type:'success',
              message:'修改成功'
            })
            this.getChapterVideo();
          }else {
            this.$message({
              type:'error',
              message:'修改失败'
            })
          }
        })
      },
      saveOrUpdateVideo(){
        if(this.video.id!=''){
          this.updateVideo();
        }else {
          this.addVideo();

        }
      },
      delVideo(id){
        this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          return video.deleteVideo(id)
        }).then(r=>{
          if (r.code==20000){
            this.dialogVideoFormVisible=false;
            this.$message({
              type:'success',
              message:'删除成功'
            })
            this.getChapterVideo();
          }else {
            this.$message({
              type:'error',
              message:'删除失败'
            })
          }
        })
      },




      //删除章节
      removeChapter(chapterId){
        this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          return chapter.deleteChapter(chapterId)
        }).then(r=>{
          if (r.code==20000){
            this.dialogChapterFormVisible=false;
            this.$message({
              type:'success',
              message:'删除成功'
            })
            this.getChapterVideo();
          }else {
            this.$message({
              type:'error',
              message:'删除失败,需要将小节删除'
            })
          }
        })
      },
      //弹框开启
      openChapterDialog(){
        this.dialogChapterFormVisible=true;
        this.chapter.id=''
        this.chapter.sort=0;
        this.chapter.title=''
      },
      addChapter(){
        this.chapter.courseId=this.courseId
        chapter.addChapter(this.chapter).then(r=>{
          if (r.code==20000){
            this.dialogChapterFormVisible=false;
            this.$message({
              type:'success',
              message:'添加成功'
            })
            this.getChapterVideo();
          }else {
            this.$message({
              type:'error',
              message:'添加失败'
            })
          }
        })
      },
      //修改一级章节
      updateChapter(){
        chapter.updateChapter(this.chapter).then(r=>{
          if (r.code==20000){
            this.dialogChapterFormVisible=false;
            this.$message({
              type:'success',
              message:'修改成功'
            })
            this.getChapterVideo();
          }else {
            this.$message({
              type:'error',
              message:'修改失败'
            })
          }
        })
      },
      //修时调用弹窗回显
      openEditChatper(chapterid){
        this.dialogChapterFormVisible=true
        chapter.getChapterInfo(chapterid).then(r=>{
          this.chapter=r.data.chapter
        })

      },
      saveOrUpdate(){

        if (this.chapter.id=='') {
          this.addChapter();
        }else {
          this.updateChapter();
        }

      },
      //根据课程id查询
      getChapterVideo(){
        chapter.addCourseInfo(this.courseId).then(r=>{
          this.allChapterVideo=r.data.allChapterVideo
        })
      },
     // 跳转到第一步
      previous(){
        this.$router.push({path:'/course/info/'+this.courseId})
      },
      next(){
        //跳转到第二步
        this.$router.push({path:'/course/publish/'+this.courseId})
      },
    }
  }
</script>

<style scoped>
  .chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
  }
  .chanpterList li{
    position: relative;
  }
  .chanpterList p{
    float: left;
    font-size: 20px;
    margin: 10px 0;
    padding: 10px;
    height: 70px;
    line-height: 50px;
    width: 100%;
    border: 1px solid #DDD;
  }
  .chanpterList .acts {
    float: right;
    font-size: 14px;
  }

  .videoList{
    padding-left: 50px;
  }
  .videoList p{
    float: left;
    font-size: 14px;
    margin: 10px 0;
    padding: 10px;
    height: 50px;
    line-height: 30px;
    width: 100%;
    border: 1px dotted #DDD;
  }

</style>
